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Resin composition and molded articles thereof

a technology of resin composition and molded articles, applied in the field of resin composition, can solve the problems of poor compatibility of polyester resin with polycarbonate resin, inability to maintain transparency of resin composition obtained, and sometimes difficult moldability of polyester resin, etc., and achieve excellent moldability

Active Publication Date: 2010-08-24
OSAKA GAS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0383]In the resin composition (RC) of this invention and molded articles thereof, the polyester resin and the polycarbonate resin have fluorene skeletons introduced thereinto.
[0384]The resin composition (RC) is excellent in resistances such as heat resistance, environmental resistance, etc., and is excellent in hydrolysis resistance in high-temperature high-humidity environments. Although having a stiff structure, the resin composition is excellent in flowability and excellent in moldability. The resin composition (RC) also has excellent optical properties such as transparency, high refractivity and low birefringence.EXAMPLES
[0385]This invention will be more specifically explained with reference to Examples hereinafter, while this invention shall not be limited in any way by these Examples. In Examples, “part” stands for “part by weight”.
[0386]Polyester resins, polycarbonate resins, resin compositions, plates, lenses or infrared absorbing filters obtained in Synthesis Examples A-1 to A-4 and B-1 to B-5, Examples 1 to 16 or Comparative Examples 1 to 5 were evaluated by the following methods.
[0387](1) Measurement of number average molecular weight (Mn): Size exclusion chromatography was carried out with HLC-8220GPC supplied by Tosoh Corporation using a chloroform eluting solution and a UV detector, and a number average molecular weight was measured as a standard polystyrene.
[0388](2) Tg measurement: Measured with a differential scanning calorimeter DSC-2910 supplied by T. A. Instruments Japan K.K. according to JIS K-7121 at a temperature elevation rate of 20° C. / minute in a nitrogen atmosphere.

Problems solved by technology

Since, however, the above fluorene PC has a stiff structure, its flowability is insufficient and its moldability is sometimes a problem in some fields of use.
However, a polyester resin has poor compatibility to a polycarbonate resin, and when a general-purpose polyethylene terephthalate is blended with a fluorene PC, transparency cannot be maintained for a resin composition obtained, and it is difficult to use this composition as a material for optical use.

Method used

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  • Resin composition and molded articles thereof
  • Resin composition and molded articles thereof
  • Resin composition and molded articles thereof

Examples

Experimental program
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examples

[0385]This invention will be more specifically explained with reference to Examples hereinafter, while this invention shall not be limited in any way by these Examples. In Examples, “part” stands for “part by weight”.

[0386]Polyester resins, polycarbonate resins, resin compositions, plates, lenses or infrared absorbing filters obtained in Synthesis Examples A-1 to A-4 and B-1 to B-5, Examples 1 to 16 or Comparative Examples 1 to 5 were evaluated by the following methods.

[0387](1) Measurement of number average molecular weight (Mn): Size exclusion chromatography was carried out with HLC-8220GPC supplied by Tosoh Corporation using a chloroform eluting solution and a UV detector, and a number average molecular weight was measured as a standard polystyrene.

[0388](2) Tg measurement: Measured with a differential scanning calorimeter DSC-2910 supplied by T. A. Instruments Japan K.K. according to JIS K-7121 at a temperature elevation rate of 20° C. / minute in a nitrogen atmosphere.

[0389](3) M...

examples 1 to 9

[0414]The polyester resins and polycarbonate resins obtained in the above Synthesis Examples were dry-blended in compositional ratios shown in Table 4, and each dry blend was separately melt-kneaded with a 15Φ twin-screw extrusion kneading machine supplied by TECHNOVEL CORPORATION at a resin temperature of 240 to 280° C. The thus-kneaded products were cooled and pelletized to give transparent resin compositions.

[0415]Pellets of each of the thus-obtained resin compositions were separately injection-molded with a 30-ton injection molding machine supplied by Toshiba Machine Co., Ltd. to obtain plates. All the plates had low refractive indices and were optically uniform.

[0416]Further, when pellets of each of the above resin compositions were separately injection-molded under the conditions of a cylinder temperature of 250 to 280° C. and a mold temperature of 100° C., the resin compositions were excellent in moldability and gave colorless transparent plastic lenses. The above lenses in a...

examples 10 to 15

[0426]The polyester resins and the polycarbonate resins obtained in the above Synthesis examples and infrared absorbents in compositional ratios shown in Table 5 were added to 341 parts of cyclopentanone, and each mixture was separately stirred at room temperature for 10 hours to give coating liquids. In any one of the coating liquids, the dispersion state of a dye was excellent. The coating liquids were separately applied onto glass plates by a spin coating method to form coatings that would have a dry film thickness of 4.0 μm each, and the coatings were dried in an oven at 80° C. for 30 minutes to give coating films (near infrared absorbing filters). In any one of these Examples, the appearance of the film was in an excellent state free of non-uniformity, etc., and when the films were observed for aggregates of dyes, no aggregates, etc., were found.

[0427]

TABLE 5Resin compositionPoly-Phthalo-PolyestercarbonatecyanineDiimmoniumresinpartresinpartDithiol dyepartdyepartdyepartExample 1...

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Abstract

A resin composition, and molded articles thereof, where the resin composition simultaneously satisfies resistances, such as heat and environmental resistance, and moldability at high levels, and has excellent optical properties, such as high refractivity and low birefringence. The resin composition contains a polyester resin formed from a dicarboxylic acid component and a diol component (a) and a polycarbonate resin formed from a carbonate-forming component and a diol component (b), the diol component (a) containing a specific fluorene-containing compound and the diol component (b) containing a specific fluorene-containing compound.

Description

TECHNICAL FIELD[0001]This invention relates to a resin composition containing a polyester resin having a fluorene skeleton and a polycarbonate resin having a fluorene skeleton and molded articles thereof.BACKGROUND ART[0002]In recent years, optical resin materials having fluorene structures have been developed for decreasing the thickness and weight of a plastic lens for use in a digital camera, a CCD camera, an optical pickup or the like.[0003]As such a resin, a polycarbonate resin having a fluorene structure (to be sometimes abbreviated as “fluorene PC” hereinafter) has come into the spotlight. This resin has excellent properties such as high heat resistance and high refractivity and is useful as a resin for optical elements. For example, JP-A 6-25398 discloses a fluorene PC containing 41 to 95 mol % of a dihydroxyphenylfluorene unit and having a specific photoelastic constant and a specific viscosity. Since, however, the above fluorene PC has a stiff structure, its flowability is...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): C08F283/02C08G63/02
CPCC08L67/02C08L67/025C08L69/00C08L2666/18C08G63/199
Inventor YANAGIDA, TAKATSUNEANDO, MASATOSHIIMANAKA, YOSHIHIKOYAMADA, MASAHIROKAWASAKI, SHINICHIYAMADA, MITSUAKIMURASE, HIROAKIFUJIKI, TSUYOSHIKOBORI, KANA
Owner OSAKA GAS CO LTD
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